At the start of the about 10,000 years ago, humans began planting crops and domesticating animals.

answer; i do believe the correct answer is (river); /// good luck

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.